COKYPHODON. 539 



angle with the angle directed posteriorly. The distance from the lobe into 

 which this angle rises to each of the intermediate tubercles is about equal. 

 There is no heel, but a short, narrow, outward-looking cingulum extending 

 from the external side of the posterior lobe, represents it. No other cingula; 

 enamel finely wrinkled where not worn. A superior incisor has the crown 

 little expanded laterally and quite thick anteroposteriorly. It has a well- 

 marked obtuse external angle, and internal basal cingulum. The external 

 faces are not flat or concave as in C. curvicristis. The superior canine has 

 an immense root, and a three-sided crown. The external and posterior 

 faces are gently convex in section, the former gently curved downwards, 

 and neither have any ridges. 



Measurements of jaws. 



M. 



Depth of ramus raaudibuli at M. iii ^ 092 



Length of bases of inferior true molars 100 



Diameters of M.ii^^"t'^^''P°^*'^"°'' 0^2 



( transverse 024 



Diameters of M. m ^ anteroposterior 043 



transverse 0275 



vertical 031 



Diameters of base of crown of inferior canine 



( transverse 027 



Width between bases of canines 095 



Width between bases of Pni. ii 044 



Length of superior canine, apex supplied 214 



Length of crown of canine, apex supplied 072 



Transverse diameter of base of crown, apex supplied 033 



The centrum of the axis is considerably wider than long, and is not 

 keeled below. The dentate process has a round section. The superior or 

 ligamentous facet is separated from the inferior or atlantal face by a groove 

 all round. Three additional cervicals, a dorsal and a lumbar vertebrte, 

 were found thirty feet down the ravine from the jaws and limb bones, ac- 

 cording to Mr. Wortman. As no other vertebrae were found with the latter, 

 and no other parts of a skeleton were associated with these vertebrae, all are 

 viewed as pertaining to the same animal. They, however, lack epiphyses. 

 As the last inferior molars, though fully protruded, are not worn on the 

 posterior lobes, the association of these vertebrae is not impossible. The 

 cervicals are quite short, and the centra are somewhat oblique, and the 

 articular faces wider than deep. The posterior is deeper than the anterior. 

 The inferior face is neither keeled nor strongly angular, and its posterior 

 border is produced so as to overlap the succeeding centrum to its middle. 



